LASI may refer to:
- Acyl-homoserine-lactone synthase, an enzyme
- Lasi, a tribe
Lasi (asomtavruli , nuskhuri , mkhedruli ლ) is the 12th letter of the three Georgian scripts.
In the system of Georgian numerals it has a value of 30.
Lasi commonly represents the alveolar lateral approximant , like the pronunciation of in "lord".